As a result of 0fc71f60cd, "empty" text
nodes (containing only whitespace) at the end of the comment may be
inside the comment's range, and trying to ignore them caused the
ranges not to match and the frame not to be detected.
Now the code works whether they're inside the comment's range or not.
Add a test case for wrapped discussion comments with HTML comments and
with whitespace.
Bug: T250126
Bug: T268407
Change-Id: I2217ff5a635fd1c9c9e803f46795b1bfb3d17535
Sequential numbers aren't great because they change when an earlier
comment is archived. Parent comment/heading IDs should change less
often.
This also makes much more sense for disambiguating subsections,
e.g. a dozen identical ===Votes=== sections for a dozen proposals.
Bug: T264478
Change-Id: I466454984fd919ebef35f2b37ddb5d86dc842996
Previously, only comments could have IDs, because we only needed IDs
for replying. But we might also use them for notifications soon.
Bug: T264478
Change-Id: I1bcad02bf17ab54bc5028a959543c10f0430836b
When there is a wrapper element whose range matches the range of
a comment, any replies will now be added outside of that wrapper,
instead of directly after the comment (inside the wrapper).
Bug: T250126
Change-Id: I6b42c4db019ae998e91eebd324f9cbd2aa791b4f
